Control device for solid-injection internal-combustion engines



Aug. 12, 1952 E. SOMMER 2,606,545

CONTROL DEVICE FOR SOLID-INJECTION INTERNAL-COMBUSTION ENGINES Filed Nov. 14, 1950 I/W/EA/f 9 14 JOMME/E Patented Aug. 12, 1952 CONTROL DEVICE FOR SOLID-IN J ECTION. INTERNAL-COMBUSTION ENGINES Erwin Sommer, Esslingen-Waldenbronn; Ger many, assignor toDaimler -Benz Aktiengesell schaft, Stuttgart- -Unterturkheim, Germany Appli at on plifyl ope ation or, the figiiie' by providing simplifled;- control and operating devices, "Another objctfofith invfitiofi isitb provide an esio'cially suitable'eombina nfor operatihg' controls for the Starter: for th flib'jnit fing" device.

An important dlijeofioff the invention is to providein iitiial engine" coi'itifolsffor'stopping the engine, for; actuat thestaitt'er and forstting the engine "fuel. con 01s;- tofa'r'i' overload volume," in tended. for: sta ing, findna single operating e r fl.

.iticoit'cling v to another. feature of the invention starting the startih'gfi'ievice and settingfth'e' fuel controls to an overloadibf staitihg position takes place 'simult'aneoii'slybv setting said operating member to a mutual starting position."

A'furtherfieatuie of; the invention makes provision forian enemy. szi litable"controllability or the'o'peraurrg, empeipermuung'to set it'to preliminariesfto" starting, for, example, to preheatin by a cut'in of. in nd 'scent 'glow' plugs or such iii eypai nciii m such a manner that, said operatin'g'm m 1; cause set consecutively into stop positio ;normai pe'siuon,position for preliminaries to Sta ng ahdstartiiig position, A stillfuiith'e 'featu, 'e'

' 1 f ed device which is'adaptedto re operating member from starting posipositiohfforf preliminaries to starting, 4 if positionfAccording to another feature. 'ofthe provisioncan be made by suitable stopsfthat the normal control (by the operator or. autgmancan mi anemone of fuel between an arm for idling and an amount for full load can take place unafiected by said operating member, when the same is in its normal position.

Other: objects and advantages of my invention Will be brought out during the iollowing'd es'crip tion of the form of my inventionwhich l have chosen to illustrat'the" features, principles, and advantages thereof. On the drawing is shown a ema c y ut of he c nt l d e p v d by the invention. The fuel-metering control member I of the fuel injection pump 2, for example, for an automotive Diesel engine is actuated, during normal operation, by a diaphragm 3 Whose one side, through a line 4, is in communication with the intake manifold of the engine in such a manner that in a known manner ion internal combustion en-' gir'is aaaptearor useln inot'oii'vehiclesfandfit is. an object of the. invention "to facilitate; and si'm'-' or. the invention relates to a November 14, 1950, Serial No. 195,507 In Germany August 3,

12 Claims (01. 123 -179 v 2 the pressure below atmospheric behind a throttle valve (which can 'be"se't-by'the' driver) in the intake manifold affects the diaphragm 3, Accordingly, with the throttle in" closed position the diaphragm 3 is drawn rightvvai'ds', whereby'the' fuelmetering control member- I; for example, a rack adapted to turn th'e'piston plunge'rs's'ets the con-" trols for fuel delivery to-anemones for idling, whereas with the throttle in open position, hence lesser pressure below atmospheric,' the fuel metering control member I is shifted leftwards to full-load volume. The fuel-meteringcontrol member A is provided with two stops 5 and 6 between whicha lever 1" 'mav'freely playvvithin' certain limits. 'Thelever T, by means oia Bow den Wire 3 a linkage or the like, is connected with a hand lever 9 supported on a shaft Ill. The lever 9 may be set into f our positions being" desighated on uieumwm'g'b Stop, Normal, Preheating Start. "Coupled to the lever 9 is a further lever l i which maybe arrangeddirectly on the Shanta or, as shown on'the drawin on a parallel shaft. The lever l serves as shift lever for the electric circuit and in position Preheat ing close's'an electric circuit [2 for th incandescent glow-plugs and in position ,Start a circult it for thestarter. Eventually, provision may also bemade for an arrangement in which the current still flows through all or at least several of the incandescent glow-plugs during actuation of the starter; A tension spring i4 returns the lever 9 into the normal position when the said lever (for example; manually'set' to preheating or starting)" is ieleased'by the'difiveri 'A ball l5 drops'into a socket it'so that in eiiect the nor mal position? is'riositivelypositionedand can not bepassed. Whereas'when the lever is moved into Stop'posi tion it" is, kept there by thespring Hi. The electricbi' cuits L2 and I3 controlled by the lever?! i are disconnected in the Normal? and Stop positioh's ofthe'lever'il.

Owing to the distance between the stops I and s t eme-nannies control member "I will 'not be him/sate the lever T when the lever 9 is in a-m gnit on. Eventually, the same applies also 'foi" 'thePreheatingtposition shown on the drawing. Whereasfwhen' the eve is brought into st ting-i position then the incl-metering control fi e I ingor overload vb'mns'exce'eumg the full-load. volume. As the lever 9 is moved into Stop position, the fuel-metering control member I is shifted rightwards by the stop 6 and therewith the fuel delivery cut out.

In accordance with th broader aspects of the invention various different embodiments of the invention may be employed within the scope of the accompanying claims.

What I claim is:

1. Control device for injection internal combustion engines comprising, a control device for regulating the amount of fuel between a stop position and an overload amount exceeding the normal full-load position, a starting device, an operating member, means for actuating said starting device by said operating member, and means connected to said operating member and adapted to shift the said control device when adjusted in one direction to the stop position and when adjusted in the other direction to the overload position.

2. Control device for injection interna1 combustion engines comprising, a control member for regulating the amount of fuel, a starting device, an operating member, means for shifting said control member by said operating member and means for actuating said starting device by said operating member, said operating member being shiftable in such a manner that in one position of said operating member said control member for regulating the amount of fuel is set to stop position and in a second position said starting device is switched in and simultaneously said control member for regulating the amount of fuel is set to an overload amount exceeding the full-load setting.

3. Control device according to claim 1 including, a device for facilitating to starting and means for actuating also said device by said operating member.

4. Control device according to claim 1 including, a device for preheating the combustion chamber of the engine and means for actuating also said device by said operating member.

5. Control device according to claim 2 including, a device for facilitating to starting and means for actuating also said device by said operating member in such a manner that the positions are consecutively as follows: stop position, normal position in which none of said devices is actuated, position for facilitating to starting and starting position in which said control member for regulating the amount of fuel is simultaneously set to overload amount.

6. Control device for injection internal combustion engines comprising, control device for regulating the amount of fuel between a stop position and an overload amount exceeding the normal full-load position, a starting device, an operating member, means for actuating said starting device by said operating member and means for shifting said control device for regulating the amount of fuel by said same operating member wherein said control device for regulating the amount of fuel comprises, a control member, means for shifting said control member independently of said operating member, stop means on said operating member and stop means cooperating with said latter stop means on said means for shifting said control member dependent upon said operating member and wherein such a play is provided between said stop means that said control member can be freely shifted by said shifting means independently of said operating member in a normal control range between no-load position and a normal full-load position without being interferred with by said stop means if said operating member is in an intermediate normal position, however, said stop means come into operating position and shift said control member into a stop respectively overload position when said operating member is shifted into corresponding positions.

7. Control device according to claim 6, wherein said control member for regulating the amount of fuel is an axially shiftable member and said stop means are formed by two stops on said last member and a lever coupled with said operating member and forming part of the shifting means, said lever being shiftable between said two stops and in its end position permitting to carry along said control member by means of said stops.

8. Control device according to claim 1 in combination with spring supported means by which said operating member is brought from an actuating position for said starting device back into a non-actuating position.

9. Control device according to claim 2 including, a normal position of said operating member between stop position and starting position in combination with spring supported means by which said operating member is brought from starting position back into normal position,

10. Control device according to claim 2 including, a normal position of said operating member between stop position and starting position in combination with spring supported means by which said operating member is brought from starting position back into normal position, said last means are arranged in such a manner that by setting said operating member to stop position, the same is held in this position by said spring supported means.

11. Control device according to claim 1 including, a normal position of said operating member between a position in which said startin means is actuated and a position in which said control device for regulating the amount of fue1 is in stop position, in combination with a spring supported click device by means of which said operating member is kept in normal position.

12. Control device according to claim 2, including a device for preheating the combustion chamber of the engine and means for actuating said preheating device from said operating member in such a manner that the positions occupied are consecutively as follows: Stop position, normal position in which none of said devices is actuated, position for preheating the combustion chamber, and starting position in which said control member for regulating the amount of fuel is simultaneously set to overload amount.

ERWIN SOMMER.

REFERENCES CITED UNITED STATES PATENTS Name Date Gardiner et a1 April 11, 1939 Number 

